    New chain ID            Original chain ID

8b3o-pdb-bundle1.pdb:
           A                       KKK
           B                       PPP
           C                       UUU
           D                       ZZZ
           E                       AAA
           F                       FFF
           G                       eee
           H                       jjj
           I                       ooo
           J                       LLL
           K                       QQQ
           L                       VVV
           M                       aaa
           N                       BBB
           O                       GGG
           P                       fff
           Q                       kkk
           R                       ppp
           S                       MMM
           T                       RRR
           U                       WWW
           V                       bbb
           W                       CCC
           X                       HHH
           Y                       ggg
           Z                       lll
           a                       qqq
           b                       NNN
           c                       SSS
           d                       XXX
           e                       ccc
           f                       DDD
           g                       III
           h                       hhh
           i                       mmm
           j                       rrr
           k                       OOO
           l                       TTT
           m                       YYY
           n                       ddd
           o                       EEE
           p                       JJJ
           q                       iii
           r                       nnn
           s                       sss
